Youth Beat Down! The Legend of the Brave Bare-Knuckled Fighter Aira.

Yuu, who was the ace and number 4 of the prestigious baseball school Reitoku Gakuen, left the baseball club due to a scandal and transferred to Tsubasa Industry. Tsubasa Industry had Yamaken, the bancho who was aiming for the national championship. Yuu gets entangled with Yamaken as soon as he transfers to a new school, but he doesn't deal with it. He is also entangled with Fujikawa of the Ozora Commercial and Fujikawa Alliance, and Yuu has no choice but to beat up Fujikawa. Hearing the story, Yamaken's apprentice Hiroshi and the others form the Yuu group and try to rebel against Yamaken, but Yuu refuses to deal with them. Yamaken, who was instigated by Haruka, who loves strong men, was about to defeat Fujikawa, but when he heard that Yuu had defeated Fujikawa, he swore to Haruka that he would defeat Yuu this time